var ns=(document.layers);
var ie=(document.all);
var w3=(document.getElementById && !ie);
function initAd()
{
	if(!ns && !ie && !w3) return;
	if(ie)                adDiv=eval('document.all.sponsorAdDiv.style');
	else if(ns)        adDiv=eval('document.layers["sponsorAdDiv"]');
	else if(w3)        adDiv=eval('document.getElementById("sponsorAdDiv").style');
	if (ie||w3)
	adDiv.visibility="visible";
	else
	adDiv.visibility ="show";
	showAd();
}
function showAd()
{
	var documentWidth;
	var documentHeight;
	if (ie){documentWidth  =document.body.offsetWidth/2+document.body.scrollLeft-20;
	documentHeight =document.body.offsetHeight/2+document.body.scrollTop-20;}
	else if (ns){documentWidth=window.innerWidth/2+window.pageXOffset-20;
	documentHeight=window.innerHeight/2+window.pageYOffset-20;}
	else if (w3){documentWidth=self.innerWidth/2+window.pageXOffset-20;
	documentHeight=self.innerHeight/2+window.pageYOffset-20;}
	adDiv.left=documentWidth-200;adDiv.top =documentHeight-25-40;
	setTimeout("showAd()",100);
}

function closeAd()
{
	if (ie||w3)
	adDiv.display="none";
	else
	adDiv.visibility ="hide";
}
